Damper-regulator.



Patented Aug. 17, 1909.

amuenioz albuuq the supply pipe and the valve within this UNITED STATESPATENT oF IoE, i

GABRIEL STEELE, or sIoUx CITY, IOWA, ASSIGNOR or oxE-ntLF To rape L.EATON, F SIOUX onr, IOWA. (2'1:

DAMPER-REGULATOR.

' Patented Aiig.'17, 1909. I Application filed. Apfil 12, 1905, SerialNo. 255,197. Renewed January 18, 1909", Serial No. 472,995.,

No. 931,095. Specification of Letters Patent.

! will be under tood that this exhausted steam Be it known that I,t'mnuna, fi'it-tsnm'a' wiiltlow rapidly throuPh the overflow pipecitizen of the. United States, residing at. i and into the cylinderabove the piston thus b'ioux City, 111 the county of ot'ull lt!' et'ualizing pressure; aboveaand below the To all whom it may concern:

State of iowa, have invented certain new pistou.- f'JiilI -M 5 3') anduseful improvementsin l amper'lteguln me hanismsofsthisiclassflin use atthe lators; and I do hereby deciare the following present. time, andwhere a. constructionsome: tobe a full, clear, and exact description ofwhat similar to l'lllllfiisftlllpltlyetl, it is neces the invention,such as will enable others saryf 'ir the weight -for-controllingthepisskilled in the art to which it appertains to ton, to act againstthe-steam within the cy e5 inder below the piston at the time of itsexhaust and hence by the provision of this overflow pipe and theconnection of the exhaust pipe therewith, .L-have, in my. met-h anism,overcome thisdisadvantage;

in the ltt'tft'llllpillt'lllg -ttlliliwalllgfi; Figure, is a perspectie:view-uniitt boileiw3fq1' L B showing the applieaiio tot'athednvexitionthereto, and, Pigtail ietletai yerticA-d see; tionalviewthrough;zithenthine-way.evalye, the valve being shown in position toadmit steam to'the cylinder; i

In the drawings there is showna simple boiler furnace I) which isprovided with fire make and use the same.

' This invention relates to damper operating devices for steam boiicrfurnaces and has for its object, to provide means arranged for automaticoperation to close the damper of the line of.the furnace when the lirebox doors are opened for the introduction of fue or other purposes. e

The primary object of the invention is to provide a mechanism of theclass described of compact structure and of such nature that it, may beapplied to any boiler furnace now in use and may hence be sold by itselffor the purpose of such applicatiui.

Broadly stated the mechanism comprises a cylinder which is arrangedpreferably upon the frontwall of the furnace and with which communicatesa fluid supply pipe and an overllow pipe. An exhaust pipe leads from avalve casing which is interposed 111 of the ft'u'nace abovethe-lire..box-doorsjs-a horizontally extruding valve; nod; or; bar Iwhich is glesi'gncd for rocking.movement; and isprovided;withwhttngersfi-whiohgex} 5; tend downwardly-oveii the ttltlOllitfbtitltigagfl 3 mentby these-almrs :w-hen:ahe lattier, areopened. Thisvwill result in a rocking movement of the valve rod as willbereatlily understood and the function ofthis .uovcmentwill lie'n'esently explained. A; e v.li1 uler.-fi is disposed in :r verticalplane upon the .front of'the furnace and is closed at its ends anddisposed within the cylinder for reciprocm tory movement therein is apiston 10. Piston rodstjl extend axially from the piston 9 aboveandbelow the same and through the. corresponding ends of the cylinder.

A fluid supply or fe al pipe 12 bent U- shaped has communication withthe cylinder at the lower end thereof and is designed to admit; steam orother'fluid under pressure into the-cylinder beneath the piston andinterposed in this supply; pipe is a. valve casing 13 with which casingan exhaust pipe t has communication. Arranged within the valve casing 13is a three-way valve 15 with which the valve rod t is directlyconnected. the arrzmgemen't. being such that. when the doors are operthe movement of the rodirevolves the i we 15 to establish casing is otthe class known as three-way valves and is automatically operated, whenthe tire box doors are opened, ioathnit the lluid through the supplypipe and into the cylinder, the passage to the exhaust pipe beingclosed. A piston is arranged within this cylinder and has extendingabove and below it: piston rods, the lower rod having a weight securedthereto and the upper rod having connect ion with a cable which connectswith the damper rod of the furnace. The admission of the fluid underpressure to the cylinder beneath the piston serves to raise the same andin so doing the cable is slackened to permit movement of the damper rodthis movement being insured by a weight which is connected with theextreme end of the cable beneath the rod and is of suflicie'i weight tomove the damper rod. The exhaust pipe is connected with the overflowpipe and when the fire box doors are again closed, and the three-wayvalve turned so as to perm it, of the exhaust, of the steam from thecylinder through the exhaust pipe, it

box doors 6,.and journaled upon the front so nine communication betweenthe portions of the supply pipe 12 which lie above and below I the valvefor the purpose of admitting steam into the cylinder as above stated.

An overflow pipe 16 leads from the upper end of the cylinder and forms ajunction with the exhaust pipe 1t and the function of this t'iverilowpipe will be presently stated. A. weight 17 is connected with the pistonrod 11 below the cylinder and serves to return the piston to thedo\-.'n'.vard limit at its movement when the doors are closed and thethree-way valve turned to permit; the steam to k..ik:l t:-l from thecylinder by way of the exhaust pipe 14.

The furnace is provided with a smoke i in which is mounted a damper 1),this damper being arranged upon a horizontal shaft 20 having a lever 21at one end and extending at right angles thereto. A cable 23 is securedto this lever and is passed over pulleys it above the same and connectedatits opposite end to the upper end of the piston rod 11 above thepiston. A weight 25 which is somewhat lighter than the weight 17 issecured to the cable 23 .below the lever 21 and exerts a tendency tohold the shaft; 230 with the damper yieldably in closed position but theweight; 17 being heavier than the weight. 25 this tcndenc is overcomeand the damper normally held open.

The operation of the system is as follows: lVhen the fire box doors areopen,'thc valve rod 7 is rocked through the instrumentality of themembers 8 and the three-way valve i 15 is turned in such a manner thatcommunication will be established between the portions of the supplypipe 12 lying above 5 Steam is thereforc' admitted into the cylinderbelow the piston 10 and serves to raise the said piston to the and belowthis valve.

limit of-its upward movement. This movement of the piston results in aslackening of the cable 23 and the weight 25 then acts to rock thedamper shaft 20 and turn the damper in position to close the fine 18.Now

when the fire box doors are closed. the

i supply of steam to the cylinder and to open conununication between thecylinder" and the exhaust pipe and the evhaustcd steam will pass throughthis pipe up through the overliow pipe 16 into the cylinder above thepiston to equalize pressure der it only necessary for the weight 17 toovercome the eight 25 and the resistance otl'ered by the turning of thedamper shal't. 2i). globe valve 20 is located in the hree-way valve willbe turned to cut oil the food pipe lfland by means of this valve the;

l l l above and below thc same and thereby renl i i i l l l said rockbar, an exhaustpipe extending I from said valve, an over flow pipeleadm" from the upper end of said cylinder an extending from the unionof said two pipes, a weighted crank provided with a damper within thesmoke flue of said furnace, a pliable connection extending from saidupwardly projecting piston rod and secured to iid crank, and a weightsecured to the .ownwardly projecting end of said piston l'uaiFtlidweight heingin excess of the weight upon said damper for the purposespecified.

in testimony whereof, I aliix my signature, in presence of twowitnesses.

GAB ll [EL STEELE.

lv itncsses BLANCIIE I. vrsox, Jessa V. HUBBARD.

from said rock bar and held against the valve within said feed pipeconnected to connected to said exhaust pipe, a waste pipe'

